This pattern won't make a triangle, more like a square. So if you want to start at the tip of one, then CO 3, knit 1 row, then k1 YO, k2 on the next. Do alll WS rows as k1 YO knit the rest of the row, and the RS rows would be k1 YO *k2tog, yo* to the end of the row and k1, repeating the (k2tog yo) sts. Keep alternating a yo knit row with the pattern row until it's as large as you want.

This pattern won't make a triangle, more like a square. So if you want to start at the tip of one, then CO 3, knit 1 row, then k1 YO, k2 on the next. Do alll WS rows as k1 YO knit the rest of the row, and the RS rows would be k1 YO *k2tog, yo* to the end of the row and k1, repeating the (k2tog yo) sts. Keep alternating a yo knit row with the pattern row until it's as large as you want.

Thankäs alot. I THINK I understand, but I have to admit I'm getting kind of dizzy.
Could you do me the favour to be a little bit more specific and make an example? Like:

CO 3

Row 1: K3
Row 2: K1, YO, K2
Row 3: K1, YO, *k2tog, yo*, K1

Continue some rows so I can get help to see the pattern... :S

I get a little confused. Shouldn't the "inside row" be Knit 1, Purl, knit the last? Where are the purls in the inside row in the example above?

There's a couple ways to do it - with purls on the WS or aslo repeating the yo k2tog pattern on the WS. The lace pattern will add only 1 stitch on the row that it's done, but to make a triangle you need 1 inc on every row or 2 on every other one. So if you do a purl row, you would have to do a YO at the beg of it.

Play around with both ideas and see how you like it. I know there's several basic shawl recipes that would work, but I can't recall where to find them. I'll try to look and see if I have a copy of one and let you know.